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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060 EISSN: 1678-8060
Vol. 96, No. 3, 2001, pp. 381-383
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Bioline Code: oc01057
Full paper language: English
Document type: Research Article
Document available free of charge
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Memórias do Instituto Oswaldo Cruz, Vol. 96, No. 3, 2001, pp. 381-383
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Resistance of Biomphalaria occidentalis from Varzea das Flores Dam, Minas Gerais, to Schistosoma mansoni Infection Detected by Low Stringency Polymerase Chain Reaction
Cecilia Pereira de Souza & Liana K Jannotti Passos
Abstract
Biomphalaria occidentalis Paraense, 1981 from Varzea das Flores dam, MG, Brazil, was exposed to infection with Schistosoma mansoni. Individual infection was performed with 140 B. occidentalis and 100 B. glabrata snails using LE and SJ strains. Two groups of B. occidentalis were killed after seven day-miracidia exposure to detect S. mansoni DNA, through the low stringency polymerase chain reaction (LS-PCR), and were negative. The infection rates were 69.2% (LE strain) and 96.7% (SJ strain) for B. glabrata and 0% for B. occidentalis. LS-PCR enabled early resistance diagnosis.
Keywords
Schistosoma mansoni, Biomphalaria occidentalis, resistance, Minas Gerais
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